早熟陆地棉纤维品质性状与生育期的相关性分析

Correlation Analysis Between Fiber Quality Traits and Growth Periods of Early-maturing Upland Cotton

【目的】为选择品质优良的早熟陆地棉品种提供理论依据和指导信息。【方法】采用Excel 2003、SPSS19.0软件,对2015-2017年参加新疆自治区早熟组区域试验的陆地棉品系的纤维品质性状及不同生育阶段进行数据统计,采取相关性分析、通径分析、逐步回归分析等统计分析方法,分析纤维品质性状与生育期间的相互关系,明确重要影响因子,并建立最优回归模型。【结果】通过通径分析表明,棉花出苗-开花阶段对棉纤维的整齐度具有很强的间接作用,对纤维长度、断裂比强度、马克隆值具有很强的直接作用;开花-吐絮阶段对棉纤维的纤维长度、伸长率具有很强的间接作用。逐步回归分析表明,出苗-开花期天数对陆地棉纤维长度、伸长率存在极显著正效应,对断裂比强度存在显著正效应,与马克隆值存在显著负效应,且可构建逐步回归模型,且t检验显著。【结论】出苗-开花期天数对陆地棉纤维长度、断裂比强度、马克隆值、断裂伸长率等纤维品质性状存在显著直接作用及间接作用;开花-吐絮天数对陆地棉纤维长度、断裂伸长率存在显著间接作用。

【Objective】The purpose of this project was to provide theoretical basis and guidance information for the selection of high-quality early-maturing upland cotton varieties.【Method】The software of Excel 2003 and SPSS19.0 were used to conduct data statistics on the fiber quality traits and different growth stages of upland cotton varieties participating in the regional test(early-maturing group)of Xinjiang Autonomous Region in 2015-2017,Statistical analysis methods such as correlation analysis,path analysis and stepwise regression analysis were used to study on the relationship between fiber quality traits and growth period,identify the important influencing factors and establish the optimal regression model.【Results】Through the path analysis,it was concluded that there were strong indirect effects on uniformity of cotton fiber,and direct effects on fiber length,fiber strength and micronaire value in the seedling-flowering stage.It had indirect effects on fiber length and elongation at flowering-toll opening stage.The results of stepwise regression analysis showed that the number of days between seedling emergence and flowering had extremely significant positive effects on fiber length and elongation,significant positive effects on fiber strength and significant negative effects on micronaire value,while a stepwise regression model could be established,and the t test was significant.【Conclusion】The number of days from seedling emergence to flowering had significant direct and indirect effects on fiber quality traits such as fiber length,fiber strength,micronaire value and elongation.The number of days from flowering to boll opening had significant indirect effects on fiber length and elongation.